UMATILLA — Award-winning children's author Christopher Tozier, above and below left, talks to teens this week at the Umatilla Public Library as part of Lake BookFest, which wraps up today.

Tozier, who lives between Cassia and Paisley, is the author of the award-winning Olivia Brophie series. "Olivia Brophie and the Pearl of Tagelus," the first in the fantasy fiction series, is the tale of young Olivia, who moves to the Florida scrub and encounters more than sand and oak trees.

"Caught in a battle for the fate of the universe, she slips down a tortoise burrow into the vast Floridan Aquifer where ancient animals thrive in a mysterious world," according to christophertozier.com. "She learns the secret of a brilliant pearl and must use its power to discover her life's ultimate destiny."